/*--------------------------------------------------|
| dTree 2.05 | www.destroydrop.com/javascript/tree/ |
|---------------------------------------------------|
| Copyright (c) 2002-2003 Geir Landr?              |
|                                                   |
| This script can be used freely as long as all     |
| copyright messages are intact.                    |
|                                                   |
| Updated: 17.04.2003                               |
|--------------------------------------------------*/

// Node object
function Node(id, pid, name, url, title, target, icon, iconOpen, open) {
	this.id = id;
	this.pid = pid;
	this.name = name;
	this.url = url;
	this.title = title;
	this.target = target;
	this.icon = icon;
	this.iconOpen = iconOpen;
	this._io = open || false;
	this._is = false;
	this._ls = false;
	this._hc = false;
	this._ai = 0;
	this._p;
};

// Tree object
function dTree(objName, htmlContainer, iconPath) {
	this.config = {
		target : null,
		folderLinks : true,
		useSelection : true,
		useCookies : true,
		useLines : true,
		useIcons : true,
		useStatusText : false,
		closeSameLevel : false,
		inOrder : false,
		check : false
	//added by wallimn 2009-02-05, to control whether checkbox is showed
	}
	this.icon = {
		root : iconPath + 'base.gif',
		folder : iconPath + 'folder.gif',
		folderOpen : iconPath + 'folderopen.gif',
		node : iconPath + 'page.gif',
		empty : iconPath + 'empty.gif',
		line : iconPath + 'line.gif',
		join : iconPath + 'join.gif',
		joinBottom : iconPath + 'joinbottom.gif',
		plus : iconPath + 'plus.gif',
		plusBottom : iconPath + 'plusbottom.gif',
		minus : iconPath + 'minus.gif',
		minusBottom : iconPath + 'minusbottom.gif',
		nlPlus : iconPath + 'nolines_plus.gif',
		nlMinus : iconPath + 'nolines_minus.gif'
	};
	//added by wallimn, to cache checkbox object and improve speed of set checked status
	this.cbCollection = new Object();
	this.obj = objName;
	this.aNodes = [];

	this.container = htmlContainer || 'dtree'; //树所在的容器
	this.aIndent = [];
	this.root = new Node(-1);
	this.selectedNode = null;
	this.selectedFound = false;
	this.completed = false;
};

// Adds a new node to the node array
dTree.prototype.add = function(id, pid, name, url, title, target, icon,
		iconOpen, open) {

	this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title,
			target, icon, iconOpen, open);
};

// Open/close all nodes
dTree.prototype.openAll = function() {
	this.oAll(true);
};

dTree.prototype.closeAll = function() {
	this.oAll(false);
};

// Outputs the tree to the page
dTree.prototype.toString = function() {
	var str = '<div class="dtree">\n';
	if (document.getElementById) {
		if (this.config.useCookies)
			this.selectedNode = this.getSelected();
		alert(this.root);
		str += this.addNode(this.root);
	} else
		str += 'Browser not supported.';
	str += '</div>';
	if (!this.selectedFound)
		this.selectedNode = null;
	this.completed = true;
	return str;
};

// Creates the tree structure
dTree.prototype.addNode = function(pNode) {
	var str = '';
	var n = 0;
	if (this.config.inOrder)
		n = pNode._ai;
	for (n; n < this.aNodes.length; n++) {
		if (this.aNodes[n].pid == pNode.id) {
			var cn = this.aNodes[n];
			cn._p = pNode;
			cn._ai = n;
			this.setCS(cn);
			if (!cn.target && this.config.target)
				cn.target = this.config.target;
			if (cn._hc && !cn._io && this.config.useCookies)
				cn._io = this.isOpen(cn.id);
			if (!this.config.folderLinks && cn._hc)
				cn.url = null;
			if (this.config.useSelection && cn.id == this.selectedNode
					&& !this.selectedFound) {
				cn._is = true;
				this.selectedNode = n;
				this.selectedFound = true;
			}
			str += this.node(cn, n);
			if (cn._ls)
				break;
		}
	}
	return str;
};

//get checkbox object by id(input by client)
//added by wallimn,
dTree.prototype.co = function(id) {
	if (this.cbCollection[id])
		return this.cbCollection[id];
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n].id == id) {
			this.cbCollection[id] = document.getElementById("c" + this.obj + n);
			break;
		}
	}
	return this.cbCollection[id];
};
//get the ids of the checkbox which check status is true;
//added by wallimn, updated: 2009-02-13
dTree.prototype.getCheckedNodes = function() {
	var res = new Array();
	var cko;//checkobject
	for ( var n = 0; n < this.aNodes.length; n++) {
		//alert("c"+this.obj+n+(document.getElementById("c"+this.obj+n).checked));
		//cache the object to improve speed when you have very,very many nodes and call this function many times in one page
		//i.e. with ajax technology
		//document.getElementById("c"+this.obj+n).checked
		cko = this.co(this.aNodes[n].id);
		if (cko.checked == true) {
			res[res.length] = this.aNodes[n].id;
		}
	}
	return res;
}
//added by wallimn
dTree.prototype.cc = function(nodeId) {
	var cs = document.getElementById("c" + this.obj + nodeId).checked;
	var n, node = this.aNodes[nodeId];
	var len = this.aNodes.length;
	for (n = 0; n < len; n++) {
		//alert(this.aNodes[n].pid+"--"+this.aNodes[n].id);
		if (this.aNodes[n].pid == node.id) {
			//if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
			//this.aNodes[n]._io = false;
			document.getElementById("c" + this.obj + n).checked = cs;
			this.cc(n);
		}
	}
	if (cs == false)
		return;
	var pid = node.pid;
	var bSearch;
	do {
		bSearch = false;
		for (n = 0; n < len; n++) {
			if (this.aNodes[n].id == pid) {
				document.getElementById("c" + this.obj + n).checked = true;
				pid = this.aNodes[n].pid;
				bSearch = true;
				break;
			}
		}
	} while (bSearch == true)
}

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId) {
	var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
	if (this.config.useIcons) {
		if (!node.icon)
			node.icon = (this.root.id == node.pid) ? this.icon.root
					: ((node._hc) ? this.icon.folder : this.icon.node);
		if (!node.iconOpen)
			node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
		if (this.root.id == node.pid) {
			node.icon = this.icon.root;
			node.iconOpen = this.icon.root;
		}
		str += '<img id="i' + this.obj + nodeId + '" src="'
				+ ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
	}

	if (this.config.check == true) {
		str += '<input type="checkbox" class="cx" id="c' + this.obj + nodeId
				+ '" onclick="javascript:' + this.obj + '.cc(' + nodeId
				+ ')"/>';
		//alert(str);
	}
	if (node.url) {
		str += '<a id="s'
				+ this.obj
				+ nodeId
				+ '" class="'
				+ ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node'))
						: 'node') + '" href="' + node.url + '"';

		if (node.title)
			str += ' title="' + node.title + '"';

		if (node.target)
			str += ' target="' + node.target + '"';

		if (this.config.useStatusText)
			str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';

		if (this.config.useSelection
				&& ((node._hc && this.config.folderLinks) || !node._hc))
			str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';

		str += '>';

	}

	else if ((!this.config.folderLinks || !node.url) && node._hc
			&& node.pid != this.root.id)

		str += '<a href="javascript: ' + this.obj + '.o(' + nodeId
				+ ');" class="node">';

	str += node.name;

	if (node.url || ((!this.config.folderLinks || !node.url) && node._hc))
		str += '</a>';

	str += '</div>';

	if (node._hc) {

		str += '<div id="d' + this.obj + nodeId
				+ '" class="clip" style="display:'
				+ ((this.root.id == node.pid || node._io) ? 'block' : 'none')
				+ ';">';

		str += this.addNode(node);

		str += '</div>';

	}

	this.aIndent.pop();

	return str;

};

// Adds the empty and line icons
dTree.prototype.indent = function(node, nodeId) {
	var str = '';

	if (this.root.id != node.pid) {
		for ( var n = 0; n < this.aIndent.length; n++)
			str += '<img src="' + ((this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line
					: this.icon.empty) + '" alt="" />';
		(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
		if (node._hc) {
			str += '<a href="javascript: ' + this.obj + '.o(' + nodeId
					+ ');"><img id="j' + this.obj + nodeId + '" src="';
			if (!this.config.useLines)
				str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
			else
				str += ((node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom
						: this.icon.minus)
						: ((node._ls && this.config.useLines) ? this.icon.plusBottom
								: this.icon.plus));

			str += '" alt="" /></a>';

		} else
			str += '<img src="' + ((this.config.useLines) ? ((node._ls) ? this.icon.joinBottom
					: this.icon.join)
					: this.icon.empty) + '" alt="" />';

	}

	return str;
};

// Checks if a node has any children and if it is the last sibling
dTree.prototype.setCS = function(node) {
	var lastId;
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n].pid == node.id)
			node._hc = true;
		if (this.aNodes[n].pid == node.pid)
			lastId = this.aNodes[n].id;
	}
	if (lastId == node.id)
		node._ls = true;
};

// Returns the selected node
dTree.prototype.getSelected = function() {
	var sn = this.getCookie('cs' + this.obj);
	return (sn) ? sn : null;
};

// Highlights the selected node
dTree.prototype.s = function(id) {

	this.delegate(id);
	if (!this.config.useSelection)
		return;
	var cn = this.aNodes[id];
	if (cn._hc && !this.config.folderLinks)
		return;
	if (this.selectedNode != id) {
		if (this.selectedNode || this.selectedNode == 0) {
			eOld = document.getElementById("s" + this.obj + this.selectedNode);
			eOld.className = "node";
		}
		eNew = document.getElementById("s" + this.obj + id);
		eNew.className = "nodeSel";
		this.selectedNode = id;
		if (this.config.useCookies)
			this.setCookie('cs' + this.obj, cn.id);
	}
};

// Toggle Open or close
dTree.prototype.o = function(id) {
	var cn = this.aNodes[id];
	this.nodeStatus(!cn._io, id, cn._ls);
	cn._io = !cn._io;
	if (this.config.closeSameLevel)
		this.closeLevel(cn);
	if (this.config.useCookies)
		this.updateCookie();
	this.delegate(id);
};

//delegate,handle custom click event
dTree.prototype.delegate = function(id) {
}

// Open or close all nodes
dTree.prototype.oAll = function(status) {
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
			this.nodeStatus(status, n, this.aNodes[n]._ls)
			this.aNodes[n]._io = status;
		}
	}
	if (this.config.useCookies)
		this.updateCookie();
};

// Opens the tree to a specific node
dTree.prototype.openTo = function(nId, bSelect, bFirst) {
	if (!bFirst) {
		for ( var n = 0; n < this.aNodes.length; n++) {
			if (this.aNodes[n].id == nId) {
				nId = n;
				break;
			}
		}
	}
	var cn = this.aNodes[nId];
	if (cn.pid == this.root.id || !cn._p)
		return;
	cn._io = true;
	cn._is = bSelect;
	if (this.completed && cn._hc)
		this.nodeStatus(true, cn._ai, cn._ls);
	if (this.completed && bSelect)
		this.s(cn._ai);
	else if (bSelect)
		this._sn = cn._ai;
	this.openTo(cn._p._ai, false, true);
};

// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(node) {
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id
				&& this.aNodes[n]._hc) {
			this.nodeStatus(false, n, this.aNodes[n]._ls);
			this.aNodes[n]._io = false;
			this.closeAllChildren(this.aNodes[n]);
		}
	}
}

// Closes all children of a node
dTree.prototype.closeAllChildren = function(node) {
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
			if (this.aNodes[n]._io)
				this.nodeStatus(false, n, this.aNodes[n]._ls);
			this.aNodes[n]._io = false;
			this.closeAllChildren(this.aNodes[n]);
		}
	}
}

// Change the status of a node(open or closed)
dTree.prototype.nodeStatus = function(status, id, bottom) {
	eDiv = document.getElementById('d' + this.obj + id);
	eJoin = document.getElementById('j' + this.obj + id);
	if (this.config.useIcons) {
		eIcon = document.getElementById('i' + this.obj + id);
		eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
	}

	eJoin.src = (this.config.useLines) ? ((status) ? ((bottom) ? this.icon.minusBottom
			: this.icon.minus)
			: ((bottom) ? this.icon.plusBottom : this.icon.plus))
			: ((status) ? this.icon.nlMinus : this.icon.nlPlus);
	eDiv.style.display = (status) ? 'block' : 'none';
};

// [Cookie] Clears a cookie
dTree.prototype.clearCookie = function() {
	var now = new Date();
	var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
	this.setCookie('co' + this.obj, 'cookieValue', yesterday);
	this.setCookie('cs' + this.obj, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path,
		domain, secure) {
	document.cookie = escape(cookieName) + '=' + escape(cookieValue)
			+ (expires ? '; expires=' + expires.toGMTString() : '')
			+ (path ? '; path=' + path : '')
			+ (domain ? '; domain=' + domain : '') + (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
dTree.prototype.getCookie = function(cookieName) {
	var cookieValue = '';
	var posName = document.cookie.indexOf(escape(cookieName) + '=');
	if (posName != -1) {
		var posValue = posName + (escape(cookieName) + '=').length;
		var endPos = document.cookie.indexOf(';', posValue);
		if (endPos != -1)
			cookieValue = unescape(document.cookie.substring(posValue, endPos));
		else
			cookieValue = unescape(document.cookie.substring(posValue));
	}
	return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
dTree.prototype.updateCookie = function() {
	var str = '';
	for ( var n = 0; n < this.aNodes.length; n++) {
		if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {
			if (str)
				str += '.';
			str += this.aNodes[n].id;
		}
	}
	this.setCookie('co' + this.obj, str);
};

// [Cookie] Checks if a node id is in a cookie
dTree.prototype.isOpen = function(id) {
	var aOpen = this.getCookie('co' + this.obj).split('.');
	for ( var n = 0; n < aOpen.length; n++)
		if (aOpen[n] == id)
			return true;
	return false;
};

// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
	Array.prototype.push = function array_push() {
		for ( var i = 0; i < arguments.length; i++)
			this[this.length] = arguments[i];
		return this.length;
	}
};

if (!Array.prototype.pop) {
	Array.prototype.pop = function array_pop() {
		lastElement = this[this.length - 1];
		this.length = Math.max(this.length - 1, 0);
		return lastElement;
	}
};

//show the tree
dTree.prototype.draw = function() {
	// renew the two array to save original data.
	this.aIndent = new Array();
	// dump original data to aNode array.
	for ( var i = 0; i < this.aNodes.length; i++) {
		var oneNode = this.aNodes[i];
		this.aNodes[i] = new Node(oneNode.id, oneNode.pid, oneNode.name,
				oneNode.url, oneNode.title, oneNode.target, oneNode.icon,
				oneNode.iconOpen, oneNode.open);
	}
	this.rewriteHTML();
}

// outputs the tree to the page , callled by show()
dTree.prototype.rewriteHTML = function() {
	var str = '';
	var container;
	container = document.getElementById(this.container);
	if (!container) {
		alert('dTree can\'t find your specified container to show your tree.\n\n Please check your code!');
		return;
	}
	if (this.config.useCookies)
		this.selectedNode = this.getSelected();
	str += this.addNode(this.root);
	if (!this.selectedFound)
		this.selectedNode = null;
	this.completed = true;
	container.innerHTML = str;
};

// Checks if a node has children
dTree.prototype.hasChildren = function(id) {
	for ( var i = 0; i < this.aNodes.length; i++) {
		var oneNode = this.aNodes[i];
		if (oneNode.pid == id)
			return true;
	}
	return false;
}

dTree.prototype.getNode = function(n) {
	return this.aNodes[n];
}

//remove a node
dTree.prototype.remove = function(id) {
	if (!this.hasChildren(id)) {
		var aNodesData = this.aNodes;		this.aNodes = new Array();		for ( var i = 0; i < aNodesData.length; i++) {			if (aNodesData[i].id != id) {				var oneNode = aNodesData[i];				this.add(oneNode.id,oneNode.pid,oneNode.name,oneNode.url,oneNode.title);			}		}
	} else {
		alert("存在子节点，不能删除");
	}
}
dTree.prototype.edit = function(id, pid, name, url, title,flag) {
	var aNodesData = this.aNodes;
	this.aNodes = new Array();
	for ( var i = 0; i < aNodesData.length; i++) {
		if (aNodesData[i].id == id) {			this.add(id,pid, name, url, title);
		} else {
			var oneNode = aNodesData[i];
			this.add(oneNode.id,oneNode.pid,oneNode.name,oneNode.url,oneNode.title);
		}
	}	if(flag){		this.add(id,pid, name, url, title);	}
};